Which high availability solution involves multiple servers servicing requests concurrently and taking over if one member fails?

The high availability solution that involves multiple servers servicing requests concurrently and taking over if one member fails is known as an active-active configuration. In an active-active setup, all servers are operational and share the workload, allowing them to handle requests simultaneously. This not only improves resource utilization but also increases fault tolerance. If one server fails, the remaining servers continue to operate, seamlessly taking over the tasks that were assigned to the failed server. This redundancy enhances the overall reliability of the system, ensuring that services remain available to users without interruption.

In contrast, other configurations, such as active-passive, involve a setup where one server is actively processing requests while another is on standby, only stepping in when the active server is inoperative. Passive configurations do not actively share the workload, reducing efficiency. Therefore, the active-active solution is preferred when continuous service availability and optimal performance are paramount.